spapr-rtas: add CPU argument to RTAS calls

RTAS is a hypervisor provided binary blob that a guest loads and
calls into to execute certain functions.  It's similar to the
vsyscall page in Linux or the short lived VMCI paravirt interface
from VMware.

The QEMU implementation of the RTAS blob is simply a passthrough
that proxies all RTAS calls to the hypervisor via an hypercall.

While we pass a CPU argument for hypercall handling in QEMU, we
don't pass it for RTAS calls.  Since some RTAs calls require
making hypercalls (normally RTAS is implemented as guest code) we
have nasty hacks to allow that.

Add a CPU argument to RTAS call handling so we can more easily
invoke hypercalls just as guest code would.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>

1 files changed, 11 insertions, 10 deletions

diff --git a/hw/ppc/spapr_rtas.c b/hw/ppc/spapr_rtas.c
index 42ed7dc093..394ce05ba2 100644
--- a/hw/ppc/spapr_rtas.c
+++ b/hw/ppc/spapr_rtas.c
@@ -38,7 +38,7 @@
 #define TOKEN_BASE      0x2000
 #define TOKEN_MAX       0x100
 
-static void rtas_display_character(sPAPREnvironment *spapr,
+static void rtas_display_character(PowerPCCPU *cpu, sPAPREnvironment *spapr,
                                    uint32_t token, uint32_t nargs,
                                    target_ulong args,
                                    uint32_t nret, target_ulong rets)
@@ -54,7 +54,7 @@ static void rtas_display_character(sPAPREnvironment *spapr,
     }
 }
 
-static void rtas_get_time_of_day(sPAPREnvironment *spapr,
+static void rtas_get_time_of_day(PowerPCCPU *cpu, sPAPREnvironment *spapr,
                                  uint32_t token, uint32_t nargs,
                                  target_ulong args,
                                  uint32_t nret, target_ulong rets)
@@ -78,7 +78,7 @@ static void rtas_get_time_of_day(sPAPREnvironment *spapr,
     rtas_st(rets, 7, 0); /* we don't do nanoseconds */
 }
 
-static void rtas_set_time_of_day(sPAPREnvironment *spapr,
+static void rtas_set_time_of_day(PowerPCCPU *cpu, sPAPREnvironment *spapr,
                                  uint32_t token, uint32_t nargs,
                                  target_ulong args,
                                  uint32_t nret, target_ulong rets)
@@ -99,7 +99,7 @@ static void rtas_set_time_of_day(sPAPREnvironment *spapr,
     rtas_st(rets, 0, 0); /* Success */
 }
 
-static void rtas_power_off(sPAPREnvironment *spapr,
+static void rtas_power_off(PowerPCCPU *cpu, sPAPREnvironment *spapr,
                            uint32_t token, uint32_t nargs, target_ulong args,
                            uint32_t nret, target_ulong rets)
 {
@@ -111,7 +111,7 @@ static void rtas_power_off(sPAPREnvironment *spapr,
     rtas_st(rets, 0, 0);
 }
 
-static void rtas_system_reboot(sPAPREnvironment *spapr,
+static void rtas_system_reboot(PowerPCCPU *cpu, sPAPREnvironment *spapr,
                                uint32_t token, uint32_t nargs,
                                target_ulong args,
                                uint32_t nret, target_ulong rets)
@@ -124,7 +124,8 @@ static void rtas_system_reboot(sPAPREnvironment *spapr,
     rtas_st(rets, 0, 0);
 }
 
-static void rtas_query_cpu_stopped_state(sPAPREnvironment *spapr,
+static void rtas_query_cpu_stopped_state(PowerPCCPU *cpu_,
+                                         sPAPREnvironment *spapr,
                                          uint32_t token, uint32_t nargs,
                                          target_ulong args,
                                          uint32_t nret, target_ulong rets)
@@ -154,7 +155,7 @@ static void rtas_query_cpu_stopped_state(sPAPREnvironment *spapr,
     rtas_st(rets, 0, -3);
 }
 
-static void rtas_start_cpu(sPAPREnvironment *spapr,
+static void rtas_start_cpu(PowerPCCPU *cpu_, sPAPREnvironment *spapr,
                            uint32_t token, uint32_t nargs,
                            target_ulong args,
                            uint32_t nret, target_ulong rets)
@@ -208,7 +209,7 @@ static struct rtas_call {
 
 struct rtas_call *rtas_next = rtas_table;
 
-target_ulong spapr_rtas_call(sPAPREnvironment *spapr,
+target_ulong spapr_rtas_call(PowerPCCPU *cpu, sPAPREnvironment *spapr,
                              uint32_t token, uint32_t nargs, target_ulong args,
                              uint32_t nret, target_ulong rets)
 {
@@ -217,7 +218,7 @@ target_ulong spapr_rtas_call(sPAPREnvironment *spapr,
         struct rtas_call *call = rtas_table + (token - TOKEN_BASE);
 
         if (call->fn) {
-            call->fn(spapr, token, nargs, args, nret, rets);
+            call->fn(cpu, spapr, token, nargs, args, nret, rets);
             return H_SUCCESS;
         }
     }
@@ -227,7 +228,7 @@ target_ulong spapr_rtas_call(sPAPREnvironment *spapr,
      * machines) without looking it up in the device tree.  This
      * special case makes this work */
     if (token == 0xa) {
-        rtas_display_character(spapr, 0xa, nargs, args, nret, rets);
+        rtas_display_character(cpu, spapr, 0xa, nargs, args, nret, rets);
         return H_SUCCESS;
     }